Testing device



FIG. 1 is a testing device showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right elevation view thereof; and,

FIG. 8 is a left elevation view thereof.

The broken line shown in the drawings are perforations and form part of the claimed design. 

CLAIM The ornamental design for testing device, as shown and described. 